Last Z Survival Saga — Difficulty, Rewards, and Progression
Quick Answer
Choose a difficulty you can finish: it stays locked for the entire Survival Saga round. Clearing all its challenges allows a higher difficulty next round. Within this round, complete each level’s tasks and defeat its Saga Zombie to advance. Arrange alliance help before selecting a difficulty beyond your solo strength.
Choose Before Committing
Survival Saga, also called Zombie Saga, is a three-day world-map challenge. Choose based on what your march can defeat and the alliance help available during the event.
Your selected difficulty is locked for the round. Clearing every challenge at that difficulty lets you choose a higher difficulty next round. Defeating a Saga Zombie advances the current run’s level; it does not change your chosen difficulty mid-round.
Server 403’s September 2026 menu has nine Normal difficulty tiers (I–IX) and six Advanced tiers (I–VI). These are difficulty choices, not the number of Saga Zombies in a run.
View the in-game survival saga difficulty and progression rules
How to Finish Your Run
- Complete the current level’s world-map zombie challenges.
- Defeat its Saga Zombie to advance to the next level.
- Collect milestone rewards as their task counters complete, then finish the remaining challenges.
Handle targets you can defeat solo, then ask your alliance for help with the actual event target when progress stops. Arrange help before choosing Advanced, and leave enough time for rallies before the event ends.
The Server 403 task panel includes milestones for defeating 2, 5, and 10 Saga Zombies. Follow your current task list; these counts are separate from the difficulty tier labels.
Normal Difficulty: Selected Rewards
These are selected columns from Server 403’s difficulty reward menu, not the full reward bundle. Compare them before choosing; the table does not imply every tier can be collected in one round.
| Normal tier | Orange skill books | Universal orange hero fragments | Purple hero fragments |
|---|---|---|---|
| I | 20 | 4 | 4 |
| II | 30 | 6 | 6 |
| III | 50 | 8 | 8 |
| IV | 70 | 10 | 10 |
| V | 80 | 12 | 12 |
| VI | 100 | 16 | 16 |
| VII | 120 | 20 | 20 |
| VIII | 130 | 22 | 22 |
| IX | 150 | 24 | 24 |
Advanced Difficulty: Selected Rewards
| Advanced tier | Universal orange hero fragments | Badges | Steel |
|---|---|---|---|
| I | 15 | 500 | 30,000 |
| II | 16 | 600 | 30,000 |
| III | 17 | 700 | 30,000 |
| IV | 18 | 800 | 90,000 |
| V | 19 | 900 | 90,000 |
| VI | 20 | 1000 | 90,000 |
Advanced rewards also include other items. The Steel column converts the menu’s 10K stacks into totals: three stacks are 30,000 Steel; nine are 90,000. Higher listed rewards only help if you can finish the required challenges.
View the in-game survival saga advanced reward menu
Use the hardest target you completed, and whether you needed help, to choose your next round’s difficulty.